Certification: Lenzing EcoVero + Oeko-Tex Class 1 LENZING ECOVERO viscose fibers are made from wood and pulp sourced from naturally grown, renewable, and certified forests in Europe, certified with the European Eco label. The fibers are biodegradable and even compostable, allowing them to return entirely to nature without causing harm to the environment and keeping our water clean. This product holds the Oeko-Tex Standard 100 certification. The Oeko-Tex® label guarantees that no harmful substances, such as chemicals, are present in the fabric. Standard 100 includes four levels of certification, with criteria for baby clothing. Meaning dyes won't be absorbed through the skin, and infants and young children should be able to safely chew on fabrics.